Cover for rollers and method of applying same



vW. H. BOLDUC.

COVER FOR RO LLERS AND-METHOD 0F APPLYING SAME.

APPLICATION F'ILED on 30. 1918.

1,4: 1 6 1 2 Patented May 25, 1920;

UNITED. STATES.

PATENT OFFICE.

WILLIAM H. BOLDUC, OF CHESTER, PENNSYLVANIA, ASSIGNOR TO DIAMOND STATE FIBRE COMPANY, OE BRIDGEPORT, PENNSYLVANIA, A CORPORATION OF DELA- WARE.

COVER FOR ROLLERS AND METHOD OE APPLYING SAME Patented May 25, 1920.

Application filed October 30, 1918. Serial No. 260,364.

To all whom it may concern Be it known that I, WILLIAM" H. BoLDUc, a citizen of the United States, residing 1n Chester, Delaware county, Pennsylvania,

have invented Covers for Rollers and Methods of Applying Same, of which the following is a specification.

In spinning machines suchas those operating according to the Bradford, French and other systems as well as others operating on cotton, wool and silk, it is customary to employ draft rolls havin a leather covering which it has hitherto been considered necessary to make in at least two layers, since if a single layer of leather was employed, its abutting or overlapping ends sooner or later became loosenedand projected from the metal roller body; it not remain permanently in the desired position upon the cylindrical metal roller surface. I

If, however, two layers of leather be employed, the second or outer layer maintains I the ends of the first layer in their proper positions, while its own ends likewise remain in the desired abutted positions since they areglued to each other and to the unadvantages of those using two layers, is con-' derlying layer of leather in a manner which cannot be attained with a single layer ;it being understood that the first as well as the second layer of the covering is held in place by a suitable glue or cement.

In view, however, of the increasing cost of leather, I have devised a covering for draft rolls which while possessing all of the siderably lessexpensive since it requires but half as much leather as has hitherto been considered necessary.

A further object of the invention is to provide a novel procedure for preparing .rolls made according to my invention.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, in which,

Figure 1 is a side elevation of a draft roll constructed according to my invention; and

Fig. 2 is a transverse vertical section of the roller shown in Fig. 1.

In the above drawings 2 represents the body of a draft roll of the ordinary construction which as usual has a pulley-like,

rying out my invention I place on such a supporting roller an endless ring or tubular body 1 of green vulcanized fiber ;that is, any desired form of parchmentized material after it has been washed to free it from the chemicals used in its manufacture but before it has been dried to remove the wash water. This ring or primary covering is of such a diameter that when put in place it closely fits the roller and it is then dried or cured for a suitable time to remove its water. As a result it shrinks and contracts to such an extent that it tightly grips the cylindrical surface of said roller. Thereafter a secondary or outer covering 3 of leather or other draft material is cemented to the primary fiber covering '1 and I have found that the overlapping ends of this outer covering will stay permanently in the positions originally given them, since the primary layer of fiber acts in the same manner as does the inner leather layer ordinarily employed.

Under operating conditions the roll can it may be replaced by another covering of leather. The rollers 'made according to my invention may not only be manufactured more cheaply than those previously employed but in addition a further economy is obtained by the use of an 'endleSs fiber primary covering or layer inplace of the second or inner ,leather layer customarily employed.

I claim I 1. A draft..,roll consisting of a body portion; a primarycovering of parchmentized fiber thereon; and a secondary cover of leather mounted on said fiber covering.

2. A draft roll consisting of a body portion; an endless vulcanized fiber ring shrunk upon said body portion; and a layer of leather cemented on said fiber ring.

3. A draft roll consisting of a body portion; a primary coveringof parchmentized fiber thereon; and a secondary covering of draft material on said fiber covering.

4. The method of making a draft roll which consists in shrinking a ring of parchmentized fiber upon a roller body and thereafter cementing a covering of draft material upon said ring.

which consists in mounting a ring of parch- 5. The method of making a draft roll mentized fiber upon a roller body and theredrying said ring; and, thereafter cementing 'after cementing a covering of draft material a covering of leather upon the'ri'ng.

upon said ring. 8. The method of making a draft roll.

6. The method of making a draft roll which consists in placing a, primary cover- 15 5"Which :consists in placing a ring ofagreen ing of parchmentizedfibrous material upon parchmentized fiber upon a roller body; a metal ;roller body; treating said layer to drying said ring; and thereafter cementing. fix it in place; and thereafter applying a p a covering of draft materi l on the ring. leather covering to said primary covering.

7. The method of making a draft roll In witness whereof I afiix iny signature.- 20 1b which consists in placing a ring of green parchmentized fiber upon a roller body; WILLTAM BOLDUC. 

